US20060017184A1 - Predictive method of assigning power to an ophthalmic lens or lens lot - Google Patents
Predictive method of assigning power to an ophthalmic lens or lens lot Download PDFInfo
- Publication number
- US20060017184A1 US20060017184A1 US10/896,517 US89651704A US2006017184A1 US 20060017184 A1 US20060017184 A1 US 20060017184A1 US 89651704 A US89651704 A US 89651704A US 2006017184 A1 US2006017184 A1 US 2006017184A1
- Authority
- US
- United States
- Prior art keywords
- lens
- mold
- power
- female
- male
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims description 19
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 230000003287 optical effect Effects 0.000 claims description 38
- 239000000463 material Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 7
- 239000004743 Polypropylene Substances 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 230000004305 hyperopia Effects 0.000 description 2
- 201000006318 hyperopia Diseases 0.000 description 2
- 208000001491 myopia Diseases 0.000 description 2
- 230000004379 myopia Effects 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 206010020675 Hypermetropia Diseases 0.000 description 1
- XQFRJNBWHJMXHO-RRKCRQDMSA-N IDUR Chemical compound C1[C@H](O)[C@@H](CO)O[C@H]1N1C(=O)NC(=O)C(I)=C1 XQFRJNBWHJMXHO-RRKCRQDMSA-N 0.000 description 1
- 101100037618 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) ant-1 gene Proteins 0.000 description 1
- 238000000540 analysis of variance Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000000017 hydrogel Substances 0.000 description 1
- 229960004716 idoxuridine Drugs 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000012417 linear regression Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000000611 regression analysis Methods 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/00432—Auxiliary operations, e.g. machines for filling the moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00951—Measuring, controlling or regulating
- B29D11/00961—Measuring, controlling or regulating using microprocessors or computers
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ophthalmology & Optometry (AREA)
- Mechanical Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Eyeglasses (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Prostheses (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
- The present invention relates to determining and assigning the power of refraction to an ophthalmic lens such as a contact lens or intraocular lens, for example. More particularly, the present invention relates to a method of accurately deriving and assigning a power to an ophthalmic lens or lens lot from the tool used to manufacture the mold from which the lens was formed.
- In the field of ophthalmic lens manufacture, and particularly in present day contact lens manufacture, a required step to measure the refractive power of the lens so that the lens power may be accurately labeled for sale. Contact lenses are offered for sale in a range of corrective powers to compensate for the patient's myopia (nearsightedness) or hypermetropia (farsightedness). The power of the lens is normally given in units of diopters, typically in 0.25 diopter increments. Instruments used to measure the power of the lens are known as may be seen in the following patents:
- U.S. Pat. No. 3,985,445 issued Oct. 12, 1976 to Essilor International
- U.S. Pat. No. 4,283,139 issued Aug. 11, 1981 to American Optical Corporation
- U.S. Pat. No. 5,175,594 issued Dec. 29. 1992 to Allergan Humphery
- U.S. Pat. No. 5,123,735 issued Jun. 23, 1992 to Bausch & Lomb Incorporated
- U.S. Pat. No. 5,432,596 issued Jul. 11, 1995 to Nidek Co.
- As the foregoing patents show, a common method of measuring and assigning the refractive power of a lens involves direct measurement of the lens itself. Challenges in directly measuring the lens are particularly seen when the contact lens is made from a hydrophilic material such as a hydrogel. When in the hydrated state, the lens is flexible and difficult to handle which many times translates into power measurement errors.
- Another method for determining the power of a lens is to measure the mold radius of the mold parts used to fabricate the lens. Since the optical surfaces of the mold parts form the optical surfaces of the lens, the power of the lens may be calculated by measuring the mold radii. This requires direct measurement of the mold radius prior to molding the lens therein since it is known that mold parts will undergo dimensional changes over time due to material shrinkage. While power determination and assignment through direct measurement of the lens and mold parts themselves have been used with success in the past, there remains a need for an improved, more cost efficient and potentially more accurate method of determining and assigning the power to a lens in a manufacturing setting.
- The present invention addresses the above need by providing a method of determining and assigning power to a lens or lens lot by deriving the power thereof from the tool that made the mold in which the lens was cast.
- A presently common method of manufacturing contact lenses is cast molding in a mold comprising a female and male mold parts. The female mold part has a concave optical surface and the male mold part has a convex optical surface. Liquid lens material is dispensed in the concave surface of the female mold part and the male mold part is seated thereon. The facing female and male mold surfaces together define a mold cavity in which the contact lens material is cured and formed into a lens. The mold parts themselves are typically made by injection molding and are used only once. They may be made of any plastic material, with polypropylene (PP) and polyvinylchloride (PVC) being common materials from which the mold parts are formed.
- In the injection mold machine which forms the mold parts, a female metal tool insert having a precise convex optical surface forms the female optical surface of the female mold part. Likewise, a male metal tool insert having a precise concave optical surface forms the male optical surface of the male mold part. The optical surfaces of the female and male mold parts form the optical surfaces of the respective female (anterior- convex) and male (posterior-concave) surfaces of the lens and must therefore be precisely formed. The optical surfaces of the metal tool inserts are typically machined with a diamond turned lathe and polished to achieve their precise optical surface.
- It will thus be appreciated that the relationship between the optical front curve of a contact lens, as formed by the optical radius of the female mold part, and the optical base curve of the contact lens, as formed by the optical radius of the male mold part, determines the contact lens refractive power. The present inventors recognized that the power of the lens may be determined, not only by measuring the lens or mold parts themselves as is the prevalent practice today, but also by measuring the radii of the female and male optical tools used to make the female and male mold parts that form the lens. This has been accurately accomplished by utilizing a linear regression model of the optical tool radii versus lens power as is discussed in more detail below. This method of lens power determination and assignment removes the need to directly handle and measure the lens or mold parts in a manufacturing line which greatly reduces manufacturing time and costs and makes the lens power determination and assignment operation more reliable.
-
FIG. 1 is an elevational view of an exemplary mold pair prior to assembly used to make a contact lens; -
FIG. 2 is the view ofFIG. 1 showing the mold pair in their assembled form; -
FIG. 3 is a side elevational view of a contact lens cast in the mold assembly ofFIGS. 1 and 2 ; -
FIGS. 4A and 4B are perspective views of a female and male mold insert used in an injection mold machine, respectively; and -
FIG. 5 is a flow chart showing the basic inventive process. - Referring now to the drawing, there is seen in
FIGS. 1-3 an exemplarycontact lens mold 10 for making acontact lens 15. Mold 10 includes a female oranterior mold part 12 having concaveoptical surface 12A and male orposterior mold part 14 having convexoptical surface 14A. To cast alens 15,liquid lens material 16 is dispensed into anterior concaveoptical surface 12A and posterior convexoptical surface 14A is seated thereon. The mold assembly is subjected to a curing cycle to form thelens 15. As seen inFIG. 4A a female (anterior)power tool insert 18 is provided having a convexoptical surface 18A for making the concaveoptical surface 12A offemale mold part 12 seen inFIGS. 1 and 3 . Additionally, a male (posterior)power tool insert 20 is provided having a concaveoptical surface 20A is seen inFIG. 4B for making the convex optical surface 16A ofmale mold part 16 inFIGS. 1 and 3 . Thepower inserts mold parts - Following manufacture of the
mold parts lens 15 may be made by dispensing a quantity ofliquid lens material 16 into the concave surface of thefemale mold part 12 and seating themale mold part 14 upon the female mold part. The lens material is then subjected to a curing cycle resulting in alens 15 being formed. - Once a
mold part - The present invention provides a method of ensuring that the mold parts to be used to make a lens of a specific power are of the correct dimensions to make that lens. Stated another way, the power of a lens to be cast, such as
lens 15, is determinable by a method of measuring the optical surface radii of the power inserts 18, 20 which are used to make the mold parts which, in turn, make the lens. Once the radii of the power inserts is known, the power of the lens to be produced by a given mold assembly is thus determinable or predictable by using a regression model of the optical surface radii of the anterior and posterior power inserts versus the lens power. - Thus, in a first aspect, the invention comprises a method of predicting the power of
lens 15 or lens lot by first measuring one or more dimensions (e.g., radius and outside diameter offset for the anterior or female power insert, and radius offset, cylinder offset and inside diameter offset for the posterior or male power insert) of moldoptical surfaces FIG. 5 , the lens manufacturing process begins with the power insertoptical surfaces 182A, 20A being measured and input into a database of a computer. Next, female andmale mold parts - A mold shrinkage regression model is developed and input into the computer which is used to compute the predicted dimensions of the mold parts given the time they have been in storage. As explained above, the time the mold parts went into storage is input into the computer database and is labeled on the mold part or mold bundle. The computer therefore knows how long particular mold parts or mold bundles have been in storage as well as their respective storage locations.
- The mold shrinkage regression model is developed using previously determined actual mold shrinkage data and readily available regression software such as MICROTAB by Microtab, Inc. or EXCEL by Microsoft Corporation. Once the shrinkage regression model is developed and input into the computer, the change in mold surface dimensions, and hence the mold dimensions over time, may be calculated. When a lens of a particular power is to be manufactured, the computer searches for a mold part or mold bundle in storage that has the correct dimensions to make a lens of that particular power. More specifically, the computer searches its database for the mold parts in storage having the dimensions, as predicted by the storage time and mold shrinkage regression model, that will make the lens of the needed power. Since the computer database and label on the mold part or bundle includes the initial mold dimensions, the time of measurement, and the location in storage of the mold dimensions it is looking for, the computer locates the required mold parts or mold bundles in storage. A mold pick unit may be utilized to physically pull these mold parts from storage. It is preferred that the mold storage and pick system operate on a first-in/first-out basis so that the oldest molds in inventory are used first. Once these mold parts are pulled from storage, the computer searches for the mating mold parts that, when assembled with the first selected mold parts (both an anterior and a posterior mold part are needed), will form a lens of the intended power. Once the mold parts have been identified, the computer utilizes a power regression model to calculate the predicted power of a lens cast with these mold parts.
- An example of developing the regression model is as follows:
- Method to Apply Regression Analysis to Develop a Power by Tool Radius Model
- 1. Establish relationship with actual data (this data is for example only).
Avg. Meas Ant Power Post Power 1/Ant 1/Pos Pwr Insert Rad Insert Rad Rad Rad −0.24 6.504 7.503 0.15375 0.13328 −1.01 6.402 7.451 0.15620 0.13421 −1.98 6.299 7.402 0.15876 0.13510 −3.01 6.201 7.348 0.16126 0.13609 −4.00 6.098 7.299 0.16399 0.13701 −5.01 6.002 7.252 0.16661 0.13789
Summary - Output
Regression Statistics Multiple R 0.9995 R Square 0.9990 Adjusted R 0.9984 Square Standard Error 0.0724 Observations 6 Significance ANOVA df SS MS F F Regression 2 16.38 8.19 1560.82 2.97E−05 Residual 3 0.02 0.01 Total 5 16.40 Coefficients Standard Error t Stat P-value Lower 95% Upper 95% Intercept 43.48056 57.9816 0.7499 0.5078 −141.0429 228.0040 1/Ant Rad −440.48291 267.3483 −1.6476 0.1980 −1291.3053 410.3395 1/Pos Rad 180.66124 743.0821 0.2431 0.8236 −2184.1600 2545.4825 - 2. Model: Y (Pred Pwr)=Intercept+1/Ant Rad Coeff×(1/Ant Rad)+1/Pos Rad Coeff×(1/Pos Rad)
- 3. Determine Appropriate Radii to Predict Powers to the nearest 0.25D
Target Power Ant Rad Nom Pos Rad Nom Pred Power −0.25 6.497 7.505 −0.25 −1.25 6.387 7.455 −1.25 −2.25 6.280 7.400 −2.25 −3.00 6.199 7.350 −3.00 −4.00 6.096 7.290 −4.00 −5.00 6.004 7.260 −5.00 - Using the above table, to obtain a target −0.25D power inserts and molds would be manufactured to the following nominals:
-
- a) Ant Nom=6.497
- b) Pos Nom=7.505
- The above applies for any desired SKU within the range of Powers used.
- Statistical analysis has shown that this method is accurate at predicting the power of a lens to be produced by a given mold assembly by measuring the power insert radii that formed the given mold parts. As such, further measurement of the molds and/or lens is no longer a necessary step in the manufacturing process. The lens and/or its package may then be labeled with this predicted power for sale without having to be directly measured.
Claims (4)
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/896,517 US20060017184A1 (en) | 2004-07-22 | 2004-07-22 | Predictive method of assigning power to an ophthalmic lens or lens lot |
PCT/US2005/025970 WO2006012471A1 (en) | 2004-07-22 | 2005-07-21 | Predictive method of assigning power to an ophthalmic lens or lens lot |
AT05776524T ATE412510T1 (en) | 2004-07-22 | 2005-07-21 | PREDICTIVE METHOD OF ALLOCATING POWER TO AN OPHTHALMIC LENS OR LENS PART |
EP05776524A EP1768835B1 (en) | 2004-07-22 | 2005-07-21 | Predictive method of assigning power to an ophthalmic lens or lens lot |
JP2007522781A JP2008507432A (en) | 2004-07-22 | 2005-07-21 | A method for predicting and specifying the frequency of an ophthalmic lens or lens lot |
CNA2005800245629A CN1988999A (en) | 2004-07-22 | 2005-07-21 | Predictive method of assigning power to an ophthalmic lens or lens lot |
ES05776524T ES2315904T3 (en) | 2004-07-22 | 2005-07-21 | PREDICTIVE PROCEDURE TO ASSIGN A POWER TO AN OPHTHALMIC LENS OR LOT OF LENSES. |
DE602005010706T DE602005010706D1 (en) | 2004-07-22 | 2005-07-21 | OPHTHALMIC LENS OR LENS PART |
CA002574655A CA2574655A1 (en) | 2004-07-22 | 2005-07-21 | Predictive method of assigning power to an ophthalmic lens or lens lot |
MX2007000697A MX2007000697A (en) | 2004-07-22 | 2005-07-21 | Predictive method of assigning power to an ophthalmic lens or lens lot. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/896,517 US20060017184A1 (en) | 2004-07-22 | 2004-07-22 | Predictive method of assigning power to an ophthalmic lens or lens lot |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060017184A1 true US20060017184A1 (en) | 2006-01-26 |
Family
ID=35064923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/896,517 Abandoned US20060017184A1 (en) | 2004-07-22 | 2004-07-22 | Predictive method of assigning power to an ophthalmic lens or lens lot |
Country Status (10)
Country | Link |
---|---|
US (1) | US20060017184A1 (en) |
EP (1) | EP1768835B1 (en) |
JP (1) | JP2008507432A (en) |
CN (1) | CN1988999A (en) |
AT (1) | ATE412510T1 (en) |
CA (1) | CA2574655A1 (en) |
DE (1) | DE602005010706D1 (en) |
ES (1) | ES2315904T3 (en) |
MX (1) | MX2007000697A (en) |
WO (1) | WO2006012471A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8634068B2 (en) * | 2011-06-16 | 2014-01-21 | Johnson & Johnson Vision Care, Inc. | Method of determining the optimal wavelength for inspecting ophthalmic lenses |
GB201515397D0 (en) * | 2015-08-28 | 2015-10-14 | Coopervision Int Holding Co Lp | Method and apparatus for manufacturing opthalmic lenses |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3985445A (en) * | 1974-05-30 | 1976-10-12 | Essilor International (Compagnie Generale D'optique) | Apparatus for measuring frontal power of contact lenses |
US4283139A (en) * | 1980-02-04 | 1981-08-11 | American Optical Corporation | Instrument for optically measuring soft contact lens parameters |
US5122314A (en) * | 1990-12-04 | 1992-06-16 | Eastman Kodak Company | Method for fabricating grin lens elements by spin molding |
US5123735A (en) * | 1988-10-25 | 1992-06-23 | Bausch & Lomb Incorporated | Method of measuring the power of a lens |
US5175594A (en) * | 1990-04-16 | 1992-12-29 | Allergan Humphrey | Lensmeter with correction for refractive index and spherical aberration |
US5244371A (en) * | 1990-12-04 | 1993-09-14 | Eastman Kodak Company | Apparatus for fabricating grin lens elements by spin molding |
US5432596A (en) * | 1992-06-30 | 1995-07-11 | Nidek Co., Ltd. | Lens measurement apparatus providing measurements of multiple lens characteristics |
US5776297A (en) * | 1994-06-10 | 1998-07-07 | Johnson & Johnson Vision Products, Inc. | Apparatus and method for preparing printing labels |
US5861114A (en) * | 1994-06-10 | 1999-01-19 | Johnson&Johnson Vision Products, Inc. | Method of manufacturing complex optical designs in soft contact lenses |
US6089710A (en) * | 1998-07-20 | 2000-07-18 | Oracle Lens Manufacturing Corporation | Single-vision ophthalmic lens series |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5545366A (en) * | 1994-06-10 | 1996-08-13 | Lust; Victor | Molding arrangement to achieve short mold cycle time and method of molding |
-
2004
- 2004-07-22 US US10/896,517 patent/US20060017184A1/en not_active Abandoned
-
2005
- 2005-07-21 MX MX2007000697A patent/MX2007000697A/en not_active Application Discontinuation
- 2005-07-21 EP EP05776524A patent/EP1768835B1/en not_active Not-in-force
- 2005-07-21 ES ES05776524T patent/ES2315904T3/en active Active
- 2005-07-21 WO PCT/US2005/025970 patent/WO2006012471A1/en active Search and Examination
- 2005-07-21 CA CA002574655A patent/CA2574655A1/en not_active Abandoned
- 2005-07-21 AT AT05776524T patent/ATE412510T1/en not_active IP Right Cessation
- 2005-07-21 DE DE602005010706T patent/DE602005010706D1/en active Active
- 2005-07-21 CN CNA2005800245629A patent/CN1988999A/en active Pending
- 2005-07-21 JP JP2007522781A patent/JP2008507432A/en not_active Withdrawn
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3985445A (en) * | 1974-05-30 | 1976-10-12 | Essilor International (Compagnie Generale D'optique) | Apparatus for measuring frontal power of contact lenses |
US4283139A (en) * | 1980-02-04 | 1981-08-11 | American Optical Corporation | Instrument for optically measuring soft contact lens parameters |
US5123735A (en) * | 1988-10-25 | 1992-06-23 | Bausch & Lomb Incorporated | Method of measuring the power of a lens |
US5175594A (en) * | 1990-04-16 | 1992-12-29 | Allergan Humphrey | Lensmeter with correction for refractive index and spherical aberration |
US5122314A (en) * | 1990-12-04 | 1992-06-16 | Eastman Kodak Company | Method for fabricating grin lens elements by spin molding |
US5244371A (en) * | 1990-12-04 | 1993-09-14 | Eastman Kodak Company | Apparatus for fabricating grin lens elements by spin molding |
US5432596A (en) * | 1992-06-30 | 1995-07-11 | Nidek Co., Ltd. | Lens measurement apparatus providing measurements of multiple lens characteristics |
US5776297A (en) * | 1994-06-10 | 1998-07-07 | Johnson & Johnson Vision Products, Inc. | Apparatus and method for preparing printing labels |
US5861114A (en) * | 1994-06-10 | 1999-01-19 | Johnson&Johnson Vision Products, Inc. | Method of manufacturing complex optical designs in soft contact lenses |
US6089710A (en) * | 1998-07-20 | 2000-07-18 | Oracle Lens Manufacturing Corporation | Single-vision ophthalmic lens series |
Also Published As
Publication number | Publication date |
---|---|
DE602005010706D1 (en) | 2008-12-11 |
ATE412510T1 (en) | 2008-11-15 |
CN1988999A (en) | 2007-06-27 |
WO2006012471A1 (en) | 2006-02-02 |
MX2007000697A (en) | 2007-03-30 |
CA2574655A1 (en) | 2006-02-02 |
ES2315904T3 (en) | 2009-04-01 |
EP1768835A1 (en) | 2007-04-04 |
EP1768835B1 (en) | 2008-10-29 |
JP2008507432A (en) | 2008-03-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6079826A (en) | Method for identifying characteristics of contact lenses | |
US5200121A (en) | Method for the manufacture of contact lenses | |
EP2028533B1 (en) | Method of calculating an optical system according to a given spectacle frame | |
EP2028531B1 (en) | Method of selecting a semi-finished ophthalmic lens according to a given spectacle frame | |
EP2037314B1 (en) | A method and computer means for choosing spectacle lenses adapted to a frame | |
EP1507135A1 (en) | Method and device for evaluating spectacle lens or mold for molding spectacle lens, and method and system for manufacturing spectacle lens | |
EP2214868B1 (en) | Process for controlling a lens manufacturing process | |
US20160124245A1 (en) | Customized lens device and method | |
CN1980779A (en) | Mold designing method, mold, and molded piece | |
EP1768835B1 (en) | Predictive method of assigning power to an ophthalmic lens or lens lot | |
EP1768834B1 (en) | Predictive method of assigning power to an ophthalmic lens or lens lot | |
US20180236737A1 (en) | Method And Apparatus For Manufacturing Ophthalmic Lenses | |
EP1918760A1 (en) | Opthalmic lens, spectacles comprising ophthalmic lenses, apparatus for manufacturing an ophthalmic lens, method for manufacturing an opthalmic lens and a store comprising an apparatus for in store manufacturing of an ophthalmic lens | |
US2077134A (en) | Ophthalmic lens | |
US20230391029A1 (en) | Customized manufacture of molds for making wavefront-customized contact lens using a wavefront aberrometer | |
US6451227B1 (en) | Method for making eye glass lenses and preforms for use therein | |
AU723441C (en) | Method for identifying characteristics of contact lenses | |
US2291663A (en) | Ophthalmic lens | |
Celentano et al. | Exploratory Development to Show Technical Feasibility of Automatic Fabrication of Spectacle Lenses in the Field |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BAUSCH & LOMB INCORPORATED, NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KEENA, DERMOT;MOONEY GERRY;GIALLOMBARDO, JOHN D.;REEL/FRAME:015256/0745;SIGNING DATES FROM 20040820 TO 20040930 |
|
AS | Assignment |
Owner name: CREDIT SUISSE, NEW YORK Free format text: SECURITY AGREEMENT;ASSIGNORS:BAUSCH & LOMB INCORPORATED;B&L CRL INC.;B&L CRL PARTNERS L.P.;AND OTHERS;REEL/FRAME:020122/0722 Effective date: 20071026 Owner name: CREDIT SUISSE,NEW YORK Free format text: SECURITY AGREEMENT;ASSIGNORS:BAUSCH & LOMB INCORPORATED;B&L CRL INC.;B&L CRL PARTNERS L.P.;AND OTHERS;REEL/FRAME:020122/0722 Effective date: 20071026 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |
|
AS | Assignment |
Owner name: BAUSCH & LOMB INCORPORATED, NEW YORK Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH;REEL/FRAME:028726/0142 Effective date: 20120518 |